Estimating the product of 87 and 65.

Consider 87 and 90 -3

Multiply 90 and 65. this would be equal to 5850 from this subtract the product of 65 and 3, that is 195.

For this subtract 200 from 5850. This would give 5650 . Now add 5 to this. The result would be 5655.

Thus the product of 87 and 65 would be 5655.

****